Kinetically Controllable Hydrogen Generation at Low Temperatures by the Alcoholysis of CaMg2-Based Materials in Tailored Solutions
作者:Ma, ML (Ma, Miaolian)[ 1,2 ] ; Chen, K (Chen, Kang)[ 1 ] ; Ouyang, LZ (Ouyang, Liuzhang)[ 1,3 ] ; Jiang, J (Jiang, Jun)[ 1 ] ; Liu, F (Liu, Fen)[ 1 ] ; Shao, HY (Shao, Huaiyu)[ 4 ] ; Zhu, M (Zhu, Min)[ 1,3 ]
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CHEMSUSCHEM
卷: 13 期: 10 页: 2709-2718
DOI: 10.1002/cssc.202000089
出版年: MAY 22 2020
文献类型:Article
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摘要
The alcoholysis of CaMg2-based materials for hydrogen generation is reported. Compared to hydrolysis in water, hydrogen supply from alcoholysis shows an excellent potential for outdoor applications, which not only bypasses the formation of passivation layers deposited on the surface of particles but also breaks the temperature bottleneck in which hydrolysis occurs over 0 degrees C. To remove the troublesome freezing issue of the water solution system in low-temperature conditions, here, instead of pure methanol, methanol/water and methanol/ethanol solutions are applied to react with CaMg2 alloy (CM2) and its hydrides (H-CM2) for hydrogen generation. Compared with pure water and ethanol, the reaction of CaMg2-based materials with methanol possesses much faster reaction kinetics and gives a considerable hydrogen yield. CM2 can generate 858 mLH2 g(-1) within only 3 min at room temperature as it reacts vigorously with methanol, as opposed to a low hydrogen yield with ethanol and water (395 and 224 mLH2 g(-1) within 180 min, respectively) under the same conditions. Even at -20 degrees C, there is still over 600 mLH2 g(-1) released at a conversion rate of 70.7 % within 100 min for methanolysis, which shows its prominent advantage for hydrogen production, especially in winter or subzero areas. Interestingly, the methanolysis byproducts can transform into metal hydroxides and methanol in the reaction with water, and the methanol may be separated and reused as an intermediate. Moreover, the hydrogen behavior of CaMg2 methanolysis can be well controlled by tailoring the components of the solutions to deliver a promising hydrogen supply system for the hydrogen economy.
关键词
作者关键词:alloys; calcium; hydrogen; hydrolysis; magnesium
KeyWords Plus:HYDROLYSIS REACTION; SODIUM-BOROHYDRIDE; MAGNESIUM; HYDRIDES; CATALYST; STORAGE; MGCL2; NANOPARTICLES; PERFORMANCE; COMPOSITES
作者信息
通讯作者地址: Ouyang, LZ (通讯作者)
显示更多South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Peoples R China.
通讯作者地址: Ouyang, LZ (通讯作者)
显示更多South China Univ Technol, Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, Peoples R China.
通讯作者地址: Shao, HY (通讯作者)
显示更多Univ Macau, Joint Key Lab, Minist Educ, Inst Appl Phys & Mat Engn IAPME, Taipa, Macau, Peoples R China.
地址:
显示更多[ 1 ] South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Peoples R China
显示更多[ 2 ] Hefei Univ Technol, Sch Chem & Chem Engn, Hefei 230009, Anhui, Peoples R China
显示更多[ 3 ] South China Univ Technol, Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, Peoples R China
显示更多[ 4 ] Univ Macau, Joint Key Lab, Minist Educ, Inst Appl Phys & Mat Engn IAPME, Taipa, Macau, Peoples R China
电子邮件地址:meouyang@scut.edu.cn; hshao@um.edu.mo
基金资助致谢
基金资助机构显示详情授权号
National Natural Science Foundation of China
NSFC51621001
National Natural Science Foundation of China
51771075
MYRG2019-00055-IAPME from University of Macau
Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2014)
National Key R&D Program of China
2018YFB1502101
No. 2018YFB1502101
Science and Technology Development Fund, Macau SAR
FDCT 0062/2018/A2
出版商
WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY
期刊信息
Impact Factor (影响因子): Journal Citation Reports
类别 / 分类
研究方向:Chemistry; Science & Technology - Other Topics
Web of Science 类别:Chemistry, Multidisciplinary; Green & Sustainable Science & Technology